iPad is two days old. i jailbroke it using comex jailbreakme. the screen is blank, no apple logo not matter what i try, nothing. while trying different things sometimes the screen will flash and my lock screen will display very briefly but that is it. i have tried: hard reset. restoring in itunes (tried setting up as a new ipad and restoring to previous backup also) charging it. pressing every button possible in every combination possible. i have no idea what else to do. please help me.